You missed the point of the examples.

They're cases of people who did nothing wrong but none the less found themselves in trouble because they didn't appreciate how their privacy was being invaded. You can argue about the merits of invading one's privacy to look for child porn, but it is an invasion of privacy, and it's one that a tremendous amount of people are complete unaware of.

That man presumed his phone was secure, and presumed the channel to his doctor was secure. So he sent sensitive images believing the only people that would see them would be the recipient, a licensed medical professional who presumably asked for or at least expected the photos. If what he believed had been true, there'd be no story.

He didn't realize that his photos were synced to g-drive, and he didn't appreciate that images backed up to a cloud are not private, and that no matter what the context, those images would trigger a response. These are all things they were ignorant of until it was too late.

The larger point is that he is not alone. A lot of people truly don't appreciate just how much information of theirs is out there on somebody else's computer, and they do not have the knowledge or the imagination to know how much trouble they could be in one day.